Ralph's Old Friend Learns Something New

"Hey, Ralph."
"Yeah?"
"A flea and a fly in a flue-"
"Oh, not this again! Here, take your pills!"
"What? Why?"
"Because you only start telling me limericks when you're about to have a heart attack, that's why!"
"That's ridiculous! You are being ridiculous!"
"How many limericks have you told me?"
"Two."
"And how many heart attacks have you had while sitting here reciting limericks?"
"Two."
"Right. Now, take your damned pills, you silly bastard!"
"Holy moly! I never thought about it like that..."
"I'll bet you haven't. Take your pills."
*gulp* "Who'd have thought limericks were so dangerous?!"